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CVE-2026-15664— Quill Forms | Conversational Multi Step Forms, Surveys & quizzes <= 5.7.1 - Unauthenticated Stored Cross-Site Scripting via Multiple Choice 'Other' Value

Quick assessment

Affected
mdmag Quill Forms | Conversational Multi Step Forms, Surveys & quizzes
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WordPress 的 Quill Forms

CVSS 7.2 · High
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I. Basic Information for CVE-2026-15664

Vulnerability Information
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Vulnerability Title
Quill Forms | Conversational Multi Step Forms, Surveys & quizzes <= 5.7.1 - Unauthenticated Stored Cross-Site Scripting via Multiple Choice 'Other' Value
Source: CVE Program / CVE List V5
Vulnerability Description
The Quill Forms | Conversational Multi Step Forms, Surveys & quizzes plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Multiple Choice 'Other' Value in all versions up to, and including, 5.7.1 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The injected script executes in the context of the WordPress admin results view, making administrators the primary target when reviewing submitted form entries.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
mdmag Quill Forms | Conversational Multi Step Forms, Surveys & quizzes 0 ~ 5.7.1 -

II. Public POCs for CVE-2026-15664

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III. Intelligence Information for CVE-2026-15664

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Vendor Advisories for CVE-2026-15664 (1)

Vendor Pages for CVE-2026-15664 (1)

Other References for CVE-2026-15664 (2)

Other References for CVE-2026-15664 (3)

IV. Related Vulnerabilities

Same product: Quill Forms | Conversational Multi Step Forms, Surveys & quizzes
Same vendor: mdmag
Same weakness: CWE-79

V. Comments for CVE-2026-15664

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